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https://issues.apache.org/jira/browse/HIVE-3904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phabricator updated HIVE-3904:
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Attachment: HIVE-3904.D7959.2.patch
navis updated the revision "HIVE-3904 [jira] Replace hashmaps in JoinOperators
to array".
Rebased to trunk
Reviewers: JIRA
REVISION DETAIL
https://reviews.facebook.net/D7959
CHANGE SINCE LAST DIFF
https://reviews.facebook.net/D7959?vs=25563&id=28821#toc
AFFECTED FILES
ql/src/java/org/apache/hadoop/hive/ql/exec/AbstractMapJoinOperator.java
ql/src/java/org/apache/hadoop/hive/ql/exec/CommonJoinOperator.java
ql/src/java/org/apache/hadoop/hive/ql/exec/HashTableSinkOperator.java
ql/src/java/org/apache/hadoop/hive/ql/exec/JoinOperator.java
ql/src/java/org/apache/hadoop/hive/ql/exec/JoinUtil.java
ql/src/java/org/apache/hadoop/hive/ql/exec/MapJoinOperator.java
ql/src/java/org/apache/hadoop/hive/ql/exec/SMBMapJoinOperator.java
ql/src/java/org/apache/hadoop/hive/ql/exec/SkewJoinHandler.java
ql/src/java/org/apache/hadoop/hive/ql/plan/JoinDesc.java
To: JIRA, navis
Cc: njain
> Replace hashmaps in JoinOperators to array
> ------------------------------------------
>
> Key: HIVE-3904
> URL: https://issues.apache.org/jira/browse/HIVE-3904
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Navis
> Assignee: Navis
> Priority: Trivial
> Attachments: HIVE-3904.D7959.1.patch, HIVE-3904.D7959.2.patch
>
>
> Join operator has many HashMaps that maps tag to some internal
> value(ExprEvals, OIs, etc.) and theses are accessed 5 or more times per an
> object, which is seemed unnecessary overhead.
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